Why do we use ball bearings?

Ball bearing is a type of rolling element bearing that uses ball to maintain separation between two moving parts. The purpose of ball bearing is to reduce rotational friction between the two rolling parts.

Ball bearings work to make something spin.It works in unison with other bearings of the same shape and size to allow a spinning motion Ball bearings actually roll around in their enclosure, which allows the object they are in to spin. Normally, the mechanism that ball bearings roll around in is called a race.It is used in Automobiles to reduce friction between the surface of the tyre and the road